目的

• neo4j自带的前端页面无法嵌入到iframe中
• 在vue中实现类似于neo4j的前端页面一样的展示。

详细

先从代码输入框入手，找到Editor.jsx文件

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/// vim src/modules/Editor/Editor.jsx
           this.execCurrent()}
            disabled={this.getEditorValue().length < 1}
            title='Play'
            icon={controlsPlay}
          />
execCurrent () {
    this.props.onExecute(this.getEditorValue())
    this.clearEditor()
    this.setState({
      notifications: [],
      historyIndex: -1,
      buffer: null,
      expanded: false
    })
  }
    onExecute: cmd => {
      const action = executeCommand(cmd)
      ownProps.bus.send(action.type, action)
    }

追踪executeCommand函数到commandsDuck.js

/// vim commandsDuck.js
// 这个文件定义了很多前后端连接的函数
handleCommandEpic() { }

然后是Graph.jsx

 initGraphView () {
    if (!this.graphView) {
      let NeoConstructor = graphView
      let measureSize = () => {
        return {
         width: this.svgElement.offsetWidth,
          height: this.getVisualAreaHeight()
        }
      }
      this.graph = createGraph(this.props.nodes, this.props.relationships)
      this.graphView = new NeoConstructor(
        this.svgElement,
        measureSize,
        this.graph,
        this.props.graphStyle
      )
      this.graphEH = new GraphEventHandler(
        this.graph,
        this.graphView,
        this.props.getNodeNeighbours,
        this.props.onItemMouseOver,
        this.props.onItemSelect,
        this.props.onGraphModelChange
      )
      this.graphEH.bindEventHandlers()
      this.props.onGraphModelChange(getGraphStats(this.graph))
      this.graphView.resize()
      this.graphView.update()
    }
  }

这个文件中出现了createGraph(this.props.nodes, this.props.relationships)这个重要的语句
追踪relationships到VisualizationView.jsx

  populateDataToStateFromProps (props) {
    const {
      nodes,
      relationships
    } = bolt.extractNodesAndRelationshipsFromRecordsForOldVis(
      props.result.records
    )

这个文件中说明了relationships与nodes的来源
接着是bolt.js

function setupBoltWorker (id, workFn, onLostConnection = () => {}) {
  const workerPromise = new Promise((resolve, reject) => {
    const work = boltWorkPool.doWork({
      id,
      payload: workFn,
      onmessage: msg => {
        if (msg.data.type === BOLT_CONNECTION_ERROR_MESSAGE) {
         work.finish()
          onLostConnection(msg.data.error)
          return reject(msg.data.error)
        }
        if (msg.data.type === CYPHER_ERROR_MESSAGE) {
         work.finish()
          reject(msg.data.error)
        } else if (msg.data.type === CYPHER_RESPONSE_MESSAGE) {
         work.finish()
          resolve(addTypesAsField(msg.data.result))
        } else if (msg.data.type === POST_CANCEL_TRANSACTION_MESSAGE) {
         work.finish()
        }
      }
    })
  })
  return workerPromise
}

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